| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic fiber coat compound of a pneumatic tire capable of suppressing the heat generation without deteriorating the processability. SOLUTION: The pneumatic tire is produced by using a rubber composition containing (A) 100 pts.wt. of a rubber and (B) 20-70 pts.wt. of a carbon black as a coat compound of an organic fiber, wherein the rubber (A) contains (i)≥50 pts.wt. of a natural rubber (NR) containing≥30 wt.% stabilized low viscosity solid natural rubber produced by pulse-wave spray-drying of a natural rubber latex containing≥0.001 wt.% viscosity stabilizer based on the weight of solid natural rubber and having a magnesium content decreased to≤0.02 wt.% based on the weight of solid natural rubber by the addition of a water-soluble ammonium salt and (ii)≤50 pts.wt. of a styrene-butadiene copolymer rubber (SBR), and the carbon black (B) has an iodine adsorption (IA) of 20-100 mg/g and a DBP absorption of 50-140 ml/100 g. COPYRIGHT: (C)2009,JPO&INPIT
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